Improvement in fruit-jars



tutti topline. j

Letters Patent N 96,490, dated 4November 2, 1869.

,/Pfr/ IMPROVEMENT IN FRUIT-JRS.

The Schedule referred to in these Letters Patent and making part of the sama To all whom it lmay concern Be it known that I, H. E. SHAFFER, of the city of Rochester,- i'n the county of liIonroe, and State of New York, have invented a certain new and useful Improvement in Fruit-Jars; and I do hereby declare that the followingl is a l'ull and `exact description ot' the same, reti-rence being had tothe .ccomlmnying drawings, making part of this specification, in which- Figure 1 is a section ot' thc top of my improved jar;

Figure 2. a side view of the cover; and

Figure 3, a bottom view ot' the same.

Like letters ot' reference indicate corresponding parts in all the tigures.

My invention consist-s' in the special construction and arrangement ot' the top ot' the, jar and the cover, whereby the packing-ring is peril-ctly enclosed in the glass itselt', and thereby prevented l'roin contact with thcclamping-ring on'thc outside, and the contcutsof the jar on the inside.

In the drawings- A represents the cover;

Ii, the jar; and

(l, the clamping-ring.

'lhe cover has a sunken centre, (l, which rests down in the neck ofthe jar. It also has'a raised rim, e, ou top, with adepressed outer shoulder, b, that receives the tlunge c ot' the clamping-ring' lt in'tllermore has a vertical tlauge, l?, which, coming down closely over the outer shoulderfot' the jar, makes a tlush outer surface. to allow the vertical iange ot the clampingeap to extend down, and screw upon the neck ot' the jar beneath.

, On the under side of the cover is formed a deep,

annular groove, (1, iig, one haltot' which, cut deeper, receives the upper rim h ot' the neck ofthe jar, whileI iu the 'outer halt' is situated a proieeting shoulder, Il',

,with sharpedgedthread which hears upon the gasket s," reslin;.r on the upper shoulder lml ot' the jar-neck.

Thegaskct isthus perfectly insulated, both trom the outside and inside ot the jar, being thus removed from violence, and prevented lroni spreading by pressure, and removed 'from contact with the t'ruir.

In order to reach the gasket, toallow air to enter iu opening, a notch, p, is formed in the outer flange d, through which a knite-blzule or other instrument may be inserted, to press up the gasket.

The special novelty' in this invention consists in the construction ot' the cover, in connection with the peculiar form of the top of the jar, in such amanner as to insulate the packing, and, at the same time, allow it to be reached in opening the jar; also, iu the method of centi-ing the cover in place by a double bearing upon the inside and upon the outside ot' the saine.

The insulation ot' the packing ou the inside is pr0- duced by tin-ming the deep groove g, and projecting the rim k ot' the jar therein nearly. to the top. Ou the outside, it is produced by the llange d of the cover A Slu-1ttin, closely down-upon the shoulder f of the jar. Inthis manner, a perfect enclosure and protection of l. Y the packing are insured, and it is prevented from crush- Iing out or becoming displaced by any pressure that mayheibronght upon it. At the same time, it can be reached, for opening the jar, by means ofthe notch 11', as betore described. Thisfluet-hod ot' insulating thf4 packing, I believe'tobe new.l

lo keep the cover in position to act upon the packing, it is desijalile lthat it'shouldfbe centred perfectly, and kept insuch position at allftinres, lo accomplish this, a double'hearing is secured to the cover, tirst, inside, hy'the resting ot' the depressedv centre a closely within the neck ot' the jar; and, second, outside, by the flange (l ot the cover striking closely down upon the lower shoulder f of the jan By means of this doublc'hearing, the cover is retained in a central position at all limes, notwitlistaiuling the turning of thc clamping-ring, and the packing cannot getdisplaced.

I do not claim, simply and broadly, enclosing the packing-ring from inside and outside contact, as I ain -aware thatsuch an effect is not new; but

\\'hat I claim as my invention, and desire to secure by Letters Patent, is-

'lhe construction ofthe top ofl the jar with the two l' exterior'[shoulders fm and raised i'lange 7i, and ofthe cover with the vertical iange (l and deep-steppedA groove g, having the threaded shoulder k, the whole so arranged thatA the packing-ring is enclosed on the sides hy the flanges tl h, and at the top and bottom by the shoulders It ou, being thereby perfectly embedded in the glass, and removed from outside friction with the clamping-ring, as well as inside contactwith the contents ofthe jar, as herein set forth.

In witness whereof', I have hereunto signed my fnzune, in the presence ot' two subscribing witnesses.

H. E. SHAFFER;

\Vitnesses:

R. F. OsGooD,

GEO. W. Mmcrg. 

